#378AB4#378AB4

#378AB4 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.1% C 0.102 H 234.2°. Best body text is #000000 at 5.46:1 contrast (WCAG AA passes).

Color values

HEX	#378AB4
RGB	rgb(55, 138, 180)
HSL	hsl(200, 53%, 46%)
HSV	hsv(200, 69%, 71%)
CMYK	cmyk(69.4%, 23.3%, 0%, 29.4%)
CIE-LAB	lab(54.33, -11.29, -29.34)
CIE-LCH	lch(54.33, 31.43, 248.95°)
OKLab	oklab(60.13% -0.0594 -0.0824)
OKLCH	oklch(60.13% 0.102 234.2)
XYZ	xyz(18.8990, 22.2824, 46.4761)
Luminance	0.2228 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378AB4 #B46137

analogous

#37B49F #378AB4 #374BB4

triadic

#378AB4 #B4378A #8AB437

tetradic

#378AB4 #9F37B4 #B46137 #4BB437

square

#378AB4 #9F37B4 #B46137 #4BB437

split-complementary

#378AB4 #B4374B #B49F37

monochromatic

#1A4256 #296685 #378AB4 #5BA7CD #8AC0DB

Accessibility & contrast

On white

3.85

#378AB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.46

#378AB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AB4

5.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378AB4	#FFFFFF	#000000	##000000
##378AB4	1.00	3.85	5.46	5.46
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.46	21.00	1.00	1.00
##000000	5.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B6

Deuteranopia (green-blind)

#647CB3

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378ab4;
/* rgb */ color: rgb(55, 138, 180);
/* oklch */ color: oklch(60.1% 0.102 234.2);

Tailwind

colors: {
  custom: {
    50: '#7dacca',
    500: '#378ab4',
    950: '#000000',
  },
}

SCSS

$custom: #378ab4;
$custom-light: #7dacca;
$custom-dark: #000000;

JSON

{
  "hex": "#378ab4",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 180
  },
  "hsl": {
    "h": 200.16,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.60126,
    "c": 0.10161,
    "h": 234.2
  },
  "luminance": 0.22284
}

Semantic roles & 50–950 ramp

primary

#378AB4

secondary

#C69881

accent

#7C4BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378AB4

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →